Hystrichosphaera bulloidea

"bulloidea" Deflandre and Cookson, 1955, p.264, pl.5, figs.3–4.  Holotype: Deflandre and Cookson, 1955, pl.5, figs.3–4.  NOW Spiniferites.  Originally Hystrichosphaera, subsequently (and now) Spiniferites.  Taxonomic senior synonym: Xanthidium (as Spiniferites) ramosum, according to Harland (1977b, p.101–102) — however, Lentin and Williams (1981, p.259) retained Hystrichosphaera (as Spiniferites) bulloidea.  Taxonomic junior synonym: Spiniferites nanus, according to Matsuoka (1983a, p.23) — however, Matsuoka (1991, table 2 — p.8) retained Spiniferites nanus.  Motile equivalent: Gonyaulax scrippsiae Kofoid, 1911, according to Wall and Dale (1967, p.352; 1968c, p.270) — however, see Head (1996b, p.1205).  Age: Eocene–Miocene.

Parent: Hystrichosphaera